

Alessandro MorettiPh.D.Italy
Laser-Based Additive ManufacturingPublished
Dec 16, 2025
Brake Pad Dust Deposits Contamination
Brake-dust contamination, it emerges from frictional wear of steel, aluminum, and cast iron during braking processes, forming adherent particulate layers that accumulate on surfaces. This residue, distinguished by its metallic tenacity and uneven distribution—which resists dislodgement more than organic dusts—behaves variably: on cast iron it embeds deeply, dependent from surface porosity, while on aluminum it manifests as thinner films, posing challenges like potential scratching in mechanical removal. Laser cleaning addresses these effectively, as the process vaporizes the particles selectively through targeted ablation, which preserves substrate integrity without residue recurrence.
Safety Information
Critical safety data for laser removal operations
Fire/Explosion Risk
low
Toxic Gas Risk
low
Visibility Hazard
moderate
Required Personal Protective Equipment
Respiratory Protection
PAPR
Eye Protection
goggles
Skin Protection
full_suit
Hazardous Fumes Generated
| Compound | Concentration | Exposure Limit | Hazard Class | Status |
|---|---|---|---|---|
| Iron Oxide (Fe2O3) | 5-25 mg/m³ | 5 mg/m³ | irritant | ✓ Within Limit |
| Copper | 0.5-3 mg/m³ | 0.1 mg/m³ | irritant | ✓ Within Limit |
| Zinc Oxide | 1-8 mg/m³ | 2 mg/m³ | toxic | ✓ Within Limit |
| Carbon Black | 3-15 mg/m³ | 3.5 mg/m³ | carcinogenic | ✓ Within Limit |
| Polycyclic Aromatic Hydrocarbons (PAHs) | 0.1-1.5 mg/m³ | 0.2 mg/m³ | carcinogenic | ✓ Within Limit |
Ventilation Requirements
Air Changes Per Hour
12
Exhaust Velocity
0.5 m/s
Filtration Type
HEPA
Particulate Generation
Respirable Fraction
70%
Size Range
0.1 - 10 μm
Substrate Compatibility Warnings
- •High laser power may damage underlying metal surface
- •Thermal stress may cause micro-cracking in cast iron components
- •Avoid prolonged exposure on thin-walled brake components

